locally finite open covering 局部有限开覆盖
weak open covering 弱开覆盖
strong open covering 强开覆盖
affine open covering 仿射开覆盖
pseudo-open-1-sequence covering mapping 序列覆盖的伪开映射
Every open covering of X has a finite sub-covering.
每个开覆盖都有一个有限子覆盖。
For such short exposures, the rear curtain starts to fall, covering up the sensor before the front curtain is even fully open.
在这样短的曝光下,后幕帘落下,在前幕帘完全打开前遮蔽感光元件。
And every open vessel, which hath no covering bound upon it, is unclean.
凡敞口的器皿,就是没有扎上盖的,也是不洁净。
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